Auto-jack



W. M. COOK.

AUTO JACK.

APPLICATION FILED OCT. 1. 1919.

Patented Aug. 10, 1920.

2 SHEETSSHEET I.

W. M. COOK.

AUTO JACK.

APPLICATION FILED OCT-1,1919.

1,348,85 1 4 Patented Allg- 10, 1920.

2 SHEETSSHEET 2.

UNITED STATES FATE NT OFFICE.

WILLIAM M. COOK, OF VTABREN, OHIO.

AUTO-JACK.

Application filed October 1, 1919. Serial No. 327,630.

T 0 all whom it may concern:

Be it known that I, l VILLIAM M. COOK, a citizen of the United States, residing at lVarren, in the county of Trumbull and Stat of Ohio, have invented certain new and useful Improvements in an Auto-Jack, of which the following is a specification.

This invention has relation to certain new and useful improvements in automobile jacks, the primary object of the invention being to provide an automobile mechanism by means of which all four wheels may be simultaneously raised, with ease, accuracy and despatch to relieve the wheels of the weight of the car while the latter is standing idle.

Vith these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claims may be resorted to when desired.

In the drawing:

Figure l is a top view of an auto jack constructed according to my invention.

Fig. 2 is a longitudinal sectional view.

Fig. 3 is a transverse sectional view, and

Fig. 4 shows a detail of one of the jacks.

In the accompanying drawings, 1 designates the forward end and 2, the rear end of a base suitably connected by means of the bolts 3, and suitably held to this base are four similar lifting jacks. As all four jacks are similar in construction, a description of one will suflice for all.

As shown each ack comprises a rectangu lar slotted stand or housing 4, with slotted stub base 5, in the slot 6, of which is slidably contained the web 7 of awedge 8 each of said wedges at their largest end having a sheave 9 each of said sheaves in turn riding against the outer edge of triangular sliding members 10, and 10 as shown in Fig. 1.

Connecting the members 10 and 10' is coupling bar comprising the two members 11 and 13 held together by means of the bolt 12, each bar in turn being connected to its memberby means of the bolts a and 2'), shown in F 1g. 2.

il'iovably held to the forward end of the sliding member 10, is the end 14L of the thrust screw 15 which is revolubly held in the thrust block 16, the screw 15 being provided with the capstan head 17 by means of which the screw is turned. Holding the end of the screw 15 is the pin 21, and the washer 22, shown in Fig. 1.

Each sliding member, 10 and 10 has a centrally positioned downwardly extending guide web 0, these webs being arranged to slide in the slots 20 in the base plates 18 and 19.

Slidably contained in each stand 4 is a lifting post 23 having a saddle block 2d at he upper end for engagement with the axle or hub of a wheel, while held to the lower end of each post 23 is a wheel 25v held on a pin 2. These wheels glide on the inclined upper faces of the wedges 3, as shown in Fig. 4.

T he operation of my device is very simple. 0n the inward movement of the triangular members 10, 10, the sheaves are engaged resulting in all four wedges 8, being shoved outv ..rd which results in the posts 23 being raised simultaneously.

The lifting members 23 are held at any point desired, by means of the screw 15. Qn the outward movement of the members 10 and 10, the weight of the load will result in the lifting posts 23 moving downward as the wheels 25 glide on their respective wedges.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of my invention will be readily understood.

I have entered into a somewhat detailed description of the present and preferred embodiment of my invention in order to imparta definite understanding of the same. I do not desire, however, to be understood as restricting myself to the exact construction shown and described, as various changes or modifications may be made in the form, size, and minor details of construction without departing from the principles or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is:

1. A lifting jack comprising a pair of triangular members, a bar connecting said members, means for moving said members, four housings, a Wedge sliding in each housing having its inner end in contact with said triangular members, and a lifting post in each of said housings having its lower end in engagement with a wedge.

2. A lifting jack comprising a base, a pair of triangular members, means for guiding said members in said base, a bar connecting said two members, a thrust block, a

screw held by said block, said screw having its inner end shackled to one of sald members, four housings, a lifting post reciproeating vertically in each of said housings, a

wedge transversely held in each housing, 15

members, and a pulley at the end ofeach of 20 said liftingposts for coaction with a wedge. In testimony whereof I aflix my si nature.

WILLIAM M. cooK.

WVitnesses GEO. W. UPTON, CHAS. C. BUBB. 

